T Nut - M3 M5 ( Parametric )

Nice nuts.

Came out great, printed using PLA+.

Very handy.

Just what is was looking for thanks for sharing

I imported the .stp file into Orca Slicer. (v2.3.0-dev.) This is the smallest model I've ever printed. (Essentially a Miniature.) The creator didn't say to use a 0.2 mm nozzle. So I used my 0.4 mm nozzle and Arachne.

A 0.2 mm nozzle would probably be better, because, if nothing else, the designed chamfer didn't print well around the hole. (0.16 mm layer height. I should have tried 0.12 mm.)

I don't know if these next issues are due to using a 0.4 mm nozzle, but I had to scale the model up 104% to that it would fit better/tighter in the extrusion slot. To that upscaling, I had to create a negative part (a cylinder) to make the hole bigger for a 3 mm screw. (Based on other challenging models I've printed, my printer is very dialed-in.)

That worked to tap the thread. (Although I still used a countersink tool to make a chamfer.) BTW, an easy way to tap the thread is to slide the T-nut into the extrusion and use the extrustion as a vise to hold the nut.

I printed my first one in PLA+, just to see what PLA+ is like. (According to Gabe at Slant3D, PLA+ isn't a standard, since manufacturers mix whatever Magic Sauce they want to PLA to make it "plus.") It seemed stronger than my next print in PETG.

But there's a subtle difference between this model and a metal OEM T-nut (at least, the metal ones that came with my Creality printer.) And that is that the end of the wings are angled on the metal ones, to give them better purchase inside the extrustion when they're twisted under load. Unfortunately, this model failed (spun in the extrustion) because it relies only on interference around the hole's shaft.

The creator included a .stp file which imports into FreeCAD. So I might try to angle out the opposite ends of the wings.

Fantastic. Works as it should!